Gas-engine.



R. KELLY.

(ms ENGINE.

APPLIOATIOH FILED NOV. 4, 1912.

1, 1 08,372. Patented Aug. 25, 1914.

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mllllll WITNESSES: INVENTOR A irolmr nan KELLY, ornnonivosrnn, mrssoifnr.

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mosses Specification of Letters Patent. Pate t g. 5, 19140 Application and Novemberd, 191a. .seriaiitarsessa To all whom it may, concern:

Be it known that l, RAY KELLY, a citizen of the United States, residing at Knobnoster, in the county ofJohnson and State of Missouri, have invented certain new and useful Improvements in GrasEngines; and I do declare the following to be a full, clear, andexact description of the invention, suchv as Willenable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and gures of reference marked thereon, which forms part of this specification.

My invention relates to internal combustion engines, and has for its principal object to provide a device of that type comprising paired cylinders, means for connecting both cylinders with a single cross head, and suitable valve mechanism whereby charges may be fired at both ends of the cylinders in proper rotation to secure a positive stroke at each movement of the cross head. In accomplishing this object, I have provided the improved details of structure hereinafter described and illus trated in the accompanying drawings, wherein:-

Figure l is a side elevation of an engine constructed according to my invention, showing the cylinders arranged vertically. Fig. H is a central, vertical section of same. Fig. fill is an end view of the cylinder cas ing showing the exhaust valve mechanism. Fig. 1V is an elevation of the casing opposite that shown in Fig. l.

Referring more in detail to the parts: 1 designates a casing for the vertically arranged paired cylinders 2-2, having jackets adapted for the circulation of a suitable cooling fluid.

Each of the cylinders has a piston l, the rod 5 of'which is extended through a stuffing box 3 in the head of the casing and con nected with a common cross head 7, which is slidably mounted between guides 8 projecting from the end of the casing 1, the outer ends of the rods being turned in Wardly to connect with the cross head adj acent the center thereof in order that the thrust of the rods may be closely adjacent the center of the cross head.

The cross head is shown connected with a crank ft: 9 through a pitrnan l0,a'lthough this portion of the deviceforins no part of my present invention: [it each end of each cylinder is the usual intake valve and sparking device, not shown, together with an exhaust valve 11 havlng a spring controlled'stem 12 adapted for actuation by an arm 13 on a shaft 1-1 which is journaled in'bearings 15 on the side of the casing and extends longitudinally therealong. There are two of the shafts 141, one provided with a gear Wheel 20 which meshes with a gear Wheel 17 on a shaft 18- which is driven from the crank shaft through a beveled gearing 19 and also meshes with the gear whee1'16 on the second shaft 14. Each of the shafts 14 has an arm 13 at each end arranged to operate the exhaust valves in proper rotation, it being apparent that by the arrangement of the gearing 16, 17 and 20 the shafts 14; will revolve in opposite directions, and that by having the arms properly arranged on the shafts, as illustrated most clearly in Fig. Hi, the valves will be operated in order from A to D, Fig. I.

With an engine of this construction, when a charge is exploded at A the piston in the upper cylinder is driven forwardly, pushing the rod 5 to forward the cross head and operate the crank shaft 9, at the same time compressing a charge in the forward end of the cylinder. When the piston has reached the forward end of its stroke, the charge in the forward end of the cylinder is exploded, driving the piston back and retracting the cross head, at the same time clearing the outer end of the first cylinder and compressing a charge in the outer cud of the lower or second cylinder. When the pistons have again reached their rearward limit the charge is exploded at C, again driving the cross head forward, carrying the first piston to clean the forward chamber of the first cylinder and compressing a charge in the forward end of the record cylinder, whichlatter is exploded in turn to return the cross head, clean the outer end of the second cylinder and compress a charge in the outer end of the first cylinder,

so that the operation just described may be repeated. it is apparent that the engine described will have the efliciency of a twocycle engine and the; simplicity of. construction and operation of a four-c cle structni'e.

' Having thus descrl ed my invention, what I claim as new therein and desire to secure by Letterslatent, is

A gas engine comprising a suitable frame a crank shaft revolubly mounted in sai frame, a reciprocatory cross-head mounted in said frame, pitman connection between said cross-head and said crank shaft, a plurality of cylinders in said frame, a piston 1n each of -said*'cylinders, a 'stuffing box in one end of each of said cylinders, a piston rodslidably mounted in each of said stuffing boxes and connecting said pistons with said cross-head, an exhaust valve in each end of each of said cylinders, a pair of shafts revolubly mounted on said frame adjacent said valves, a plurality of arms on said shafts adapted for operative engagement with said exhaust valves, intermeshing gears on said shafts, a third shaft revolu ly mounted in said frame, a pinion on said shaft for meshing with one of said gears, and means for operatively connecting said third shaft with said crank shaft to actuate each of said exhaust valves once during two revolutions of said crank shaft.

In testimony whereof I affix my signature in presence oftwo witnesses.

. p v RAY KELLY.

Witnesses LEWIS L.- MILLER,

LETA E. COATS. 

